With the bottom case half in the position that it would be when fully dressed, the daughter card attaches to the MLB on the left side of the PB. A RAM expansion card (vide supra. Now see what you Latinists have started ...) attaches to the DC at its rear edge, just inboard of the video-out port and video-up ribbon. If you don't see this third plane or layer, and there is an empty connector next to the video-up connector, you are blessed with only the on-board RAM: 4MB. Not fatal, but mildly inconvenient. There is a complete guide to Mac RAM (as at 2000) here. It is not the latest, but the penultimate. Natheless, the info. about PB160 and friends is adequate, as is the diagram. As for the familial relationship between cards in a PB, take heart. The 165c has a cousin card for RAM expansion.

The enabler can be found on the second floppy disk of System Update 3 (for System 7.1) with all other enablers then known to mankind. Iterum vide supra.

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